Frederick Griffith made a scientific discovery in 1928. Which best describes the knowledge about genetics before 1928?

A. Scientists did not think that traits were inherited.

B. Scientists thought that only viruses contained DNA.

C. Scientists thought that traits were passed along by DNA.

D. Scientists did not know how traits were inherited.

Your answer would be d

Frederick Griffith's discovery on the theory of genetics is credited to his experiment on mice. He subjected them to different strains of pneumonia bacteria. He concluded that there is an unidentified force that leads to the formation of different strains from what the mice were subjected to. This leads to the discovery of DNA, the carrier of traits. Scientist before did not know how the trait is passed on not until Griffith's experiment.